iRhythm Ownership | Who Owns iRhythm?
iRhythm Ownership Summary
iRhythm is owned by 110.36% institutional investors, 1.17% insiders. Tudor investment corp et al is the largest institutional shareholder, holding 63.31% of IRTC shares. Sands Capital Global Growth Equity is the top mutual fund, with 4.68% of its assets in iRhythm shares.
IRTC Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | iRhythm | 110.36% | 1.17% | -11.53% |
| Sector | Healthcare Stocks | 245.07% | 12.10% | -157.17% |
| Industry | Medical Device Stocks | 52.73% | 12.62% | 34.65% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Tudor investment corp et al | 20.00M | 63.31% | $27.45M |
| Vanguard group | 3.31M | 10.29% | $587.42M |
| Blackrock funding, inc. /de | 2.99M | 9.18% | $355.15M |
| Blackrock | 2.50M | 8.03% | $269.35M |
| Rtw investments, lp | 2.18M | 6.71% | $259.62M |
| Artisan partners limited partnership | 1.66M | 5.11% | $197.49M |
| Vanguard capital management | 1.46M | 4.50% | $174.05M |
| Millennium management | 1.41M | 4.33% | $167.30M |
| Fmr | 1.19M | 3.67% | $141.79M |
| Ubs asset management americas | 944.52K | 2.91% | $112.35M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Prosight management, lp | 165.50K | 3.39% | $19.69M |
| Braidwell lp | 654.26K | 2.88% | $77.82M |
| Rtw investments, lp | 2.18M | 2.22% | $259.62M |
| Sectoral asset management | 26.07K | 2.16% | $3.10M |
| Ophir asset management pty | 201.49K | 1.97% | $23.97M |
| Kampmann melissa s. | 21.01K | 1.89% | $2.50M |
| Healthinvest partners ab | 54.10K | 1.73% | $6.44M |
| Rock springs capital management lp | 269.65K | 1.57% | $32.07M |
| Eventide asset management | 880.34K | 1.40% | $104.71M |
| First light asset management | 167.09K | 1.21% | $19.88M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Tudor investment corp et al | 20.00M | 0.05% | 20.00M |
| Rtw investments, lp | 2.18M | 2.22% | 514.13K |
| Sixth street partners management company | 298.30K | 0.00% | 298.30K |
| Westfield capital management co lp | 288.92K | 0.11% | 288.92K |
| Blackrock funding, inc. /de | 2.99M | 0.01% | 244.16K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Sands capital management | - | - | -1.70M |
| Holocene advisors, lp | 783.64K | 0.21% | -465.02K |
| Fiera capital | - | - | -381.64K |
| Mackenzie financial | - | - | -371.48K |
| Slate path capital lp | - | - | -365.40K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Tudor investment corp et al | 20.00M | 0.05% | 20.00M | $27.45M |
| Sixth street partners management company | 298.30K | 0.00% | 298.30K | $35.48M |
| Norges bank | 148.07K | 0.00% | 148.07K | $17.61M |
| Uss investment management | 106.96K | 0.05% | 106.96K | $12.73M |
| Champlain investment partners | 97.02K | 0.30% | 97.02K | $11.54M |
Sold Out
| Holder | Change |
|---|---|
| Coppell advisory solutions | -1.00 |
| Dunhill financial | -1.00 |
| National bank of canada /fi/ | -1.00 |
| Wealthspire advisors | -1.00 |
| Ronald blue trust | -2.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 | 314 | -0.32% | 35,874,949 | 0.99% | 110 | 0.90% | 165 | 7.14% | 90 | -15.89% |
| Mar 31, 2026 | 137 | -59.94% | 7,757,583 | -77.95% | 24 | 0.20% | 61 | -59.87% | 40 | -67.74% |
| Dec 31, 2025 | 278 | -20.11% | 24,936,629 | -28.15% | 77 | 0.64% | 122 | -29.07% | 98 | -14.04% |
| Sep 30, 2025 | 333 | 5.38% | 54,680,163 | 54.50% | 169 | 1.35% | 164 | -2.38% | 112 | 19.15% |
| Jun 30, 2025 | 316 | 18.35% | 35,390,802 | -1.62% | 112 | 0.86% | 169 | 26.12% | 93 | 9.41% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Sands Capital Global Growth Equity | 1.51M | 4.68% | -488.05K |
| Vanguard US Total Market Shares ETF | 1.01M | 3.21% | 68.62K |
| Canada Life US Small-Mid Cap Growth A | 1.00M | 3.19% | -41.02K |
| Vanguard MStar Total Stk Mkt Idx Invest | 1.03M | 3.13% | 4.09K |
| Vanguard Morn Total Stk Mkt Idx Investor | 1.03M | 3.12% | 156.00 |
| Vanguard Total Stock Mkt Idx Inv | 1.03M | 3.12% | 156.00 |
| iShares Russell 2000 ETF | 841.52K | 2.56% | -14.98K |
| Vanguard Small Cap Index | 743.36K | 2.26% | 1.91K |
| American Funds New Economy A | 625.22K | 1.93% | - |
| Capital Group New Economy Comp | 625.22K | 1.93% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Sep 02, 2026 | Wilson Daniel G. | Chief Financial Officer | Sell | $94.17K |
| Aug 10, 2026 | Blackford Quentin S. | President and CEO | Sell | $3.35M |
| Aug 10, 2026 | Murphy Patrick Michael | CBO and CLO | Sell | $884.16K |
| Aug 10, 2026 | Patterson Chad | CHIEF COMM & PRODUCT OFFICER | Sell | $884.17K |
| Aug 10, 2026 | Shrishrimal Sumi | EVP, Chief Risk Officer | Sell | $669.64K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q3 | - | 11 |
| 2026 Q2 | 1 | 6 |
| 2026 Q1 | - | 37 |
| 2025 Q4 | - | 10 |
| 2025 Q3 | - | 17 |
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